湘东桃水矿区煤储层特征及煤层气资源分析

Analysis of Coal Reservoir Features and CBM Resource Potential in Taoshui Mining Area

为研究桃水矿区煤层气地质条件,基于勘探资料与实验数据,分析了桃水矿区煤储层与含气性特征,评价了煤层气资源潜力。研究表明:研究区2、4煤层累计厚度3.28 m,煤层含气量4.58~13.34 m^3/t,含气性较好。煤层煤体结构较破碎,孔隙发育,渗透性好,含气饱和度低,储层压力适中(常压储层)。研究区煤层气地质资源量6.98×108 m^3,资源丰度0.60亿m^3/km^2,资源前景较好。

The paper analyzes the characteristics of coal reservoirs and gas-bearing properties based on exploration and experimental data and evaluates the resource potential of CBM in Taoshui Mining Area,which shows that the cumulative thickness of the 2rd and the 4th coal seams in the study area is 3.5 m;gas content is 4.58~13.34 m^3/t with good gas bearing;the coal seams have a broken coal structure,more developed pores,better permeability,low gas saturation,and moderate reservoir pressure(atmospheric reservoir);and the geological resources of CBM is 6.98×108 m^3 and the resource abundance 0.06 billion m^3/km^2 with good resource prospects.